Engine-valve.



A. B. MOHLER.

ENGINE VALVE.

APPLICATION FILED Jmmo, 1912.

1,088,609, Patented Feb. 24, 1914.

. 4 SHEETS-SHEET l.

A. B. MOHLER.

ENGINE VALVE.

A. B. MUHLER. ENGINE VALVE. APPLICATION FILED JAN. 20, 1912.

Patented Feb. 24, 1914,

4 SHEETS-SHEET 3.

VIV|TNESSES @46am/Ld mf ATTORNEY A. B. MOHLER. ENGINE VALVE. APPLIUATION FILED JAN. zo, 1912.

1,088,609, Patented Feb.24,1914.

4 SHEETS-BHEBT 4. l 1 l/ 57 2.9/ 53 WITN ESSES ATTORNEY ALEXANDER ilLiHL-ER, O3 MEXICG, MEKCO.

Application filed .le-nner# 20, 191:1.

`is to 'provide a valve Structure 'wherein "che valve porte tire relatively large and Wherein power loesee diie to valve construction are in e large measure eliminnted.

ln accordance 'with the present invention the inlet; and exhanet. porie of the engine,

which ie of the four cycle type, ere controlled by slide valves Separately but reletiveljt7 actuated. These valves; are provided with .large vieseeges through them which when brought .into coincidence with each other and with the porsfthey control pro-- Vide ample space for the charge and iior the escape oit the gases oi" combustion. 4These valves: ere so arranged :te to slide :easily with relation one to the other end to n housing for the 7elves, while provision is made for the ready removal oit the valves for inspection or repairs, which latter may be made et e minimum cost, and in e. minimum of time, while the general appearance oi' the motor is improved, and, moreover, iihe construction is such that the valves muy be thoroughly water iacketedf7 thus keeping,- them comparenively cool and free from the troubles resulting from eizceeeire expznr Sion of the metal under the action of heet.

The invention will be beet underetood from e consideration oi" the Yfollowing de'- tniled descriijition, token in connection with the accompanying drawings forming n part of 'this speciticntion, with the understanding, however, that `while the drawings Show two practical embodiments; oiI the invention7 the lutter is by no means limited to any exact conformity with the showing of the drawings. but may be embodied in other formes so long es there is no marked de pertnre from the scope oit the invention.

ln the drawings: Figure 1 is in elevation of en engine with the improved valve strucd ture applied, some parts being' omitted for cleernees oi illustration. Fig. 2 e hvertical Section through the upper end of en engine cylinder sind relie Structure applied there to. Fig. 3 is n plan View of one end of e mulini-cylinder engine with the cylinder Specification ci." Letters Patent.

lyric-rented lli eb, fell, 1914i. Serial No. 672,424.

head removed und e portion oi the valve crank case :ilse removed, the holding bolts :ind other parte being; shown in section. Fig. fl is n'longitndinol section oit' .ai portion of o. multi-cylinder engine on the line l l of Fig. 1, but drawn to a larger seele. Fig. 5 is n: pcinpectire View oi one of the valves controlling the inlet and exl'niunt ports. Fig. 6 is en. elevation partially in section oi ai n'iodiiied iorni oi' engine construction so 'for es the valve inechnniem is concerned.

T, 8, 9 and 1.0 are Viens partly in section and partly in diagram of the valves :ind Valve actuating .mechanism to illus` trote the differenty phases of the valve movements. l

Referring to the drawings there is shown an engine provided with n. cylinder or cylindere 1 in accordance with Whether the engine is oi' the single or mulei-cylinder type, lfind in the )erticul:ir iorin oi. engine shown it is provided with. :1, crzinlc cziee 2. crunk snuit 3, ily wheel 1l. supporting webs 5, magneto (3. pump i' :tor the cooling' water, and suitable driving mechanism itor the faire structure, which in the Ashorv'ing of Fig. l is hidden lie-euse inclcsed in casing members 8, 9, 10 :ind 11, the valve driving mechanism oleo Serving ne e ineens Jfor driring e. shuit 1L, which at one end carries the rotor of the pump 7 and at the other the armature of the. magneto 6. I The structures so 'For described may be taken as typical of any suitable :t'orin of explosion engine oi. the it'our cycle type.

rlhe cylinder portion oif the engine ie provided with e Water jacket 13, which in the main muy iollow the usual practice, and each cylinder hns lodged therein :i piston 11i- Wlxich may correspond to pistons :is new all;v employed in explosion engines. One iside oi2 the explosion end ot' eoch cylinder is entered by n pnsonge lo lorn spark plug indicated et 1G in Fig 1.

The invention being' npplienble to either n Single cylinder or e. multi-cylinder engine, the description oi the invention Will in the mitin be contined to n. single cylinder., since Ithe description of one cylinder will apply to all or" the cylinders. The explosion chamber end oil the c if'linder is provided with on inlet poriA` 17 and nn exhaust port 1S, the two ports being Separated by a hollowv web 19 haring a poe-sugo 20 through it communicating with the interior of the Water jacket 13 surrounding the cylinder, so that; each port sides of a diameter of thev cylinder, the latter being circular, as isy customary, and in this manner the area of each port may be materially greater than the area of a circular port, such as is commonly employed where puppet valves are used. At opposite ends ofthe ports and extending perpendicuv lar to the' length of these ports the cylinder structure. is provided with ribs 21 forming between them a channel 22 open at both ends, and of adepth equal to the height of tne ribs. Appliedto the ribs 21 is a cylinder head 23 which for a multi-cylinder engine may be long enough to cover all the cylinders. This head is supported by the ribs 21 .and may be secured'to the ported end of the cylinder by bolts 24. It is desirable that the depth of the channel 22 be variable at will within suitable limits, wherefore there'are introduced between thesupporting surfaces of the ribs 21 and the cylinder head a suitable number of very thin liners or shims 25, and by adding to the number o f these liners or removing one or more of them, the depth of the channel 22 is very readily varied. The head 23 has extending therethrough conduits 26, 27, provided with passages o1I ports 28, 29, respectively, matching the respective ports 17 and 18, but spaced from the latter by a distance equal to the depth or thickness of the channel 22. The conduit 26 is designed to convey fuel to the cylinder through the matching ports 28 and. 17 and the conduit 27 constitutes the exhaust conduit communicating with the interior of the cylinder through the passages 29 and 18. It will be understood, of course, that the fuel conduit 26 is in communication with a suitable source of fuel and that the exhaust conduit 27 may be lconnected to an exhaust pipe for the proper disposition of the products of combustion by way of a muier, if desired,

when the engine is used upon an automobile.

' The interior of the head 23 is provided with a water chamber 30 which may `receive or discharge water through a pipe 31, while the. water jacket 13 is connected to the pump 7 by a pipe '32. While the cooling cham-- bers have been referred to as water jackets, it will be understood that this term is employed largely in a typical sense, since other cooling mediums besides water may be utilized. The channel 22 is, so far as the engine cylinder and head 23 are concerned open' at both ends,.and one end is closed by a cap plate 33 of sufficient extent to projecty for'a distance on to the water jacket of the engine cylindenandon to the head 23, and this cap platelsprovidedwith a channel 34 havjingitsends openingthrough passages 35, 36, respectively, into the interior of the` waterv jacket 13 and'the chamber 30 in the head 23,

whereby there may be established a circulation of water or other cooling medium -from the jacket 13 to the chamber 30 or in the contrary direction, as may be desirable.l Access to the channel 22 is readily obtainable by th removal of the plate 33. While not shown, it willv be understood, of course, that suitable packing is provided between" the plate 33 and the parts with which it engages, and at all other parts of the engine where packing is advisable, andl since this is the common -practice in explosion engines, no further mention thereof is deemed necessary.

Lodged within the channel 22 are two plates 37, 38,' the plate 37 being provided with two ports 39 and 40, respectively, while the plate 38 is provided with two ports 41, 42, respectively, the ports 39 and'40 being closer together than the ports 41 and 42 and all the ports being of the same dimensions both with respect to each other and with respect tothe ports 17 and 19 in so far as the showing rof the drawing is concerned, but it will be understood that while the ports 17, 28, 39 and 41 should be all of the same, or approximately the samesize, and the ports 18, 29, 40 and 42 should likewise be of the same or approximately the same size, it is. notl mandatory that the two sets of port/s', should be of the same size, or even approximately the same size. The two plates 37 and 38 constitute slide valves and are togetherI of a thickness to snugly yet freely fit within the channel 22 with respectV to the depth of such channel and of a width to snugly, yet freely, fit within the channel with respect to its width.

Mounted at one side of the channel, 22 is a crank sha-ft 43 having .bearings 44, preferably anti-friction bearings, at each end in supporting members 45.. The shaft 43 is provided with two crank portions 46, 47, respectively, carrying pitmen 48 connected tov respective extensions 49 of the two slide 1 valves 37 and 38, these extensions being on respectively opposite sidesof the center line of the valves, so that they may pass each other, thus permitting the compacting of the valve structure. The crank shaft 45 is housed in l-a`cas`ing 50 having a `cover 51 which may be made readily removable, and this casing is Vso vshaped as to provide a po'cket 52 for'lubricant, so that the crank shaft with the parts carried thereby, and the valves 37 and 38, may be lubricated by the splash system, this forming a convenient means of lubrication. It will be understood, of course, that any other convenient system oflubrication for thevalves 37 and 38 may be adopted.

One end of the crank shaft 43 carrie-s a worm gear wheel 53 meshing with a worm 54 on shaft 55 receiving motion from the 'Lose crank shaft 3 t-lirouggh the transmission gearingheiore.referred to? but which is .not shown in detaih the arrangement beingr such, as is customary, that the valves shall be operated in proper relation to the crank shaft 3 in accor-dann- With the usual timingr in 'tour cycle enfrines, except that with the valve structure ot the present invention the relative opening and closing of the valves ma)r have asligrhtly dil'lerent relation than in the ease oit puppet valves. yllhe crank shaft t3 in its rotation causes a reciprocatory movement ot' the tKvo slide valve plates Wand 38, and the relation of movement of these tivo plates will be best understood from a consideration ot' Figs. lo l0.

The angular displacement. of the cranks -ll and fl-.7 is about seventy-one degrees. although this particular displacen'ient need not be mandatory, but has been found to impartto the slide valves the desired relative movements-` ln each. of Y to 10 the `cranks Ll-G and el? are considered. as rotating' clockwiser` Wherefore the valves 3T and 3S will be reciprocated to the right and left as viewed in these iigures. As shown in Fig. T the lvalve 38 which is connected to the crank LI -T moving' to the right at its great est speed. while the valve E? which is connected to .the crank Llr6 also moving to the right, but at a slow speed due to the relation of the vtwo cranks to the dead center. thisI point on until the crank 47 reaches the dead center line, the valve 37 is accelerating in speed and the valve 38 is slowing up and when the crank Il? passes the dead center line, which in the position shown in S is the three oclock position, the valve 3S begins its movement toward the left, while the valve 3T continues its moven'ients Vtoward the right. This conoition ot atli'airs continues with an acceleration of the movement oit the valvel 3S and the slowing1 up oli' the valve 37' until the crank lr6 reaches the three oclock position, and then both valves move toward the left until the crank #i7 reaches the six oclock position, vvhen the valve 38 will `begin to Slow upA` While the valve B7 accelerates, the valve 37 attaining; its highest speed when the crank iti reaches the six oclock position, and lwhen crank l? reaches the nine oclock or dead center position the valve 38 begins itsI movement toward the rightand continues with increasing' speed, Wliilethe valve 3T continues its movement toward the lett with decreasing speed. until .tinallv the crank '-16 reaches the nine oclock position, beyond which point the valve 3T moves toward the right with accelerating` speed, ivhile the valve 38 is moving 'toward the right 'with accelerating` speed until the crank 41T.reacl'ies the twelve olelock position as considered with relation to Fig. 7.

The valves 37 and 38 in Fig. 7 have Itheir ports 39 and 4l approaching the closed poiooo F rom l sition while the port l-, ot the vvalve 38 is blanked by the plain portion ot the valve 37 then interposed between the ports JBZ and Q9. Both the inlet and exhaust passages tor the cylinder are thereby closed and remain closed during the power stroke of the piston et the cylinder which is assumed to be then taking); place, the parts being then apinoximately in the position shown in Fig. 3. lluringr the return or scavenging stroke ol' the piston the valves move to the position shown in Fig. 9 vvhere the ports Vl-.0 and are approxin'iatelvv in a line one with thr other and with the ports '1S and 2l), thus permittinga iiree escape of lthe products ot' combustion. rthe arrangement is such that the exhaust ports close ai'ter the crank shaft has passed the top center b v ten degrees, While the inlet ports open on the exact up center ot the crank shalt, Wherefore there is an overlap ot' the inlet and exhaust port-s duringl this ten degrees of movement and the intlowingr 'fuel would have a tendency to tlv directly across to lhe exhaust port7 while the same is exhausting, which tendency, however, is prevented by the Web 19.

ln the position oit the parts shown in Fig. I the exhaust port is closed and the inlet port is about to close. ln Fig. 8 there is shown the position ot the parts during the tiring period ot` stroke. In Fig. 9 the valves are shown With the exhaust port open7 and this is during the scavenging stroke, while in Fig. l() the inlet port is about to open with the exhaust port closed.

In Fie'. (3 the valves 3T and B8 are upright and move parallel with the longitudinal axis of the cylinder instead of perpendicular thereto, as in the structure shown in the other gures. In this construction the cap portion oit the cylinder is not necessarily a separate member, but may be cast in one piece with the cylinder7 as indicated at While the ports 1'? and 1S at the end oit the cylinder of Fig. 2 are replaced by ports 1T and 18a at one side ot' the cylinder which is provided with a laterally expanded portieri 5T for the accommodation ot these ports5 and to this laterally expanded portion 57 there is applied a member 23vl which ma)v be in substantialhv all respects similar to the cylinder head 223 oit the other figures, and in so tar as the parts correspond, they are indicated in Fig. o bv the same reference numerals.. lau approvpriate point the engine ot' Fig. (S carries a crank shaft stil which mayY he similar to the crank shaft #l-: and 'this shait is connected by pil'men -lSn with the slide valves, lnstead oit transmitting power from the main crank shal't of the engine to the crank shaft 43a lj vvorm geen a silent chain drive 58, mali,r connect the crank shaft 3 with the crank shaft 113, While the pitmen 4:8 and portions 93 of the slide valves extending Vhaust-A ports beyond the cap 23 are inclosed by a suitable removable casing 59, whereby access to.the valve crank shaft and the valves may be had at any time by th removal of .the Casin 59.

The va ves 37 and 38 are, where liable .to

lthe action of the heat generated by the eX- ports 41 and 42 of the valve 88, the latter.

named valve being the one adjacent the explosion chamber of the engine. Thisl is the arrangement which is employed when theV crank shaft driving the valvesfirotates in a certain direction. Should the crank shaft driving the valves rotate in the opposite direction with the main crank shaft of the engine rotating in the same direction as b'efore7 then the valves 3"( and 38 are reversed in position, that is, the valve 37 is close to the explosion chamber of the engine instead of the valve 38 in order that the movelments of the valves may occur in proper timed relation to the reciprocation of the engine piston.

With the present invention the engine follows the lines of the ordinary explosion engine to the explosion chamber ends of v the cylinders and the valves have the same general relation to the cylinder or cylinders as is found in the great majority of explosion engines. Should there occur a heavy demand upon the engine, as when used upon a racing automobile or for hill climbing contes-ts. or under some similar condi-Y tions, the slide valves may be afforded a little more clearance by loosening up the bolts holding the cylinder head in position,-

so that even though there should be a greater expansion than usual, due to the heating up of the engine because of the heavy load ut thereon, the valves will still run as free y as before, since the clearance is always ample, or may be made so without reducing the etliciency of the engine where there is a liability of a prolonged heavy demand upon the engine.

What is claimed is 1'. An explosion engine of the four cycle type provided with adjacent inlet and eX- having flat associated slide 'val-ves'f'movable 'one on the other and in traversin@ relation to the saidwports and ealr proyided. with` a pair of-adjacent ports,

and means for actuating the valves in timed relation through the cycles of operation of the engine.

2. A four cycle explosion engineprovided with adjacent inlet and exhaust ports. and continuations thereof-matching said ports with a valve chamber between said ports and their continuations, associated slide valves lodged in the valve chamber and each provided with a pair of adjacent ports, and

means for actuating the valves to bring the ports into and out of matching relation one with another and with respective engine ports in timed relation relative to the cycles of operation of the engine.

3. An explosion engine provided with a cylinder having adjacent inlet and exhaust l ports at one end, a head provided with inlet and exhaust ports matching those of the cylinder and said cylinder and head dening a valve chamber, ported substantially fiat plates adapted to the valve chamber when in face engagement one with the other, and means for moving the plates in the valve chamber in traversing relation to the matching ports of the cylinder and head to bring the ports in the plates into and out of matching relation one to the other and with the cylinder and head ports in timed relation to the movements of the engine. v

4. An explosion engine provided with inlet and exhaust ports and two valves in the form of flat plates slidable one on the other in traversing relation tothe inlet and exhaust ports, each valve being provided with two ports movable into and out of matching relation with ports' of the other valve and with the inlet and exhaust ports of the enaine, the ports of one plate being spaced differently from those of the other.`

5. An explosion engine provided with adljacent inlet and exhaust ports, two valves each plate being provided with two spacedv ports movable into and out of matching relation with the ports of the other valve and with the engine ports, and means for imparting variable speed reciprocatory movements to the valves, the Vports in one valve being in closer` relation than those of the other valve.

7 An explosion engine having a cylinder provided with adjacentinlet and exhaust Leeacoe ports` a cap member tor the ported portion of the cylinder also provided ivith adjacent ports matching those ot the ii-ylinderi and with paeeages tor tuel and producta ot combustion, the cylinder and cap member being provided vvith internal chambers 'tor a cooling medium and the cylinder being proviiiled.l

With a channel for a cooling medium between the adjacent ports, aulietanlially llal slide valves in traversing relation lo thc ported portion ot the t vlinder and the cap member therefor, said slide valves having ports, and means tor moving the slide valves in timed relation to bring the ports ot lthe valves into and out. of matching relation to the inlet and exhaust ports oi the cylinder.

8. An explosion engine provided vvith a cylinder having adjacent inlet and exhaust ports at the explosion chamber end, a cap member for the ported portion of the cylinder, said cap member having adjacent ports matching thosse of the cylinder and With the cylinder delining a valve chamber, the cylinder and cap member having cham bers therein for the circulation of a cooling medium, and the cylinder having a channel for a cooling medium intermef'liate oit' the adjacent ports, substantially flat slide valves adapted to the chamber between the cap member and ported end o'f the cylinder with the valves in face Contact and each provided With adjacent ports, and means for rcciproeating the valves to bring their ports into matching relation one to the other and with the respective cylinder ports in timed rela` tion to the movements of the engine piston.

9. An explosion engine provided 1Frith a cylinder having adjacent inlet and exhaust ports at the explosion chamber endf a cap member for the ported portion et the cylin der, said cap member having` adjacent ports matching those oli' the cylinder and with the cylinder defining a valve chamben the cylinder and cap member having chaml'iers therein for the circulation of a cooling medium, and the cylinder having a channel for a cooling medium intermediate ot the adjacent ports, substantially itat elide valves adapted `to the chamber between the cap member and ported end ot the cylinder with the valvesI in 'tace contact and each provirilcd with adjacent porte7 and means ior reciprocating the valvers to bring their porte into matching relation one with the other and With` the respective cylinder ports` in timed relation to the movementa` ciE the engine pie ton, the cylinder, cap and valve ports being elongated in one direction and the valves being movable in a direction. transverse 'to the elongation of the ports.

l0. An explosion engine having a cylinder with ,adjacent inlet and exhaust ports and a channel into which tbe porte open, a cap member :tor the ported portion ol: the cylinder constituting a cover .member tor the channel and provided 'with adjacent ports matching those of the cylinden and recipcatory slide valves each havingadjacent portsy spaced dil'lercntly from those oil the other and both provided witlrdriving connections; to movable parts ot the engine and adapted to the channel between the cylinder and cap member. y

il. in explosion enginehaving ay cylinder with adjacent inlet and exhaust ports and a channel into .vhich the ports open, a cap member for the ported portion of the cylinder constituting a cover member tor the channel and provided with adjacent portav matching those ot the cylinder, and reciprocatory slide valves each having vadjacent ports spaced diiferently 'from those of the other and both provided with driving connections to movable parts oit the engine and adapted to the channel between the cylinder and cap member, Said slide valves being each in the t'orln of a tlat plate.

12. A, tomi cycle explosion engine having adjacent inlet and exhaust porta elongated transversely to the direction of flow ot' ma,- terial. therethrough, and a pair of reciprocable associated slide valves cach in the 'form of a Hat plate with a jiilurality of adjacent elongated ports therein adapted to match the ports of the cylinder7 the direction ot reciprocation of the valve@` being perpendicnlar to the elongation ot' the ports.

Alil. 'l'onr cycle enOine having adjacent inlet and cxhznist ports,I elongated trans# veraely to the direction of `lion' ol. material t'lierethro h, and a. pair of reciprocable as sociatcd l alves cach `in the .torni ot' a tial plate with a pair oit adjacent elongated porte therein adapted to match the ports of the cylinder, the direction ol recipri'ication et' the valvea` being perpendicular to the elongation et the ports, the engine on the explosion chamber lside ot the 'alves being provided 'willi jmsaaffea tor the tloiv of a cooling medium in sm'rouinling relation to 'the ports.

ll. )n explosion engine provided ivith a cylinder having adjacent .inlet and exhaust pints, a detachable cap member for the ported portion ot the cylinder and also pro vided vvith adj acont intake and erhaltet passagem matching the intake and exhaust ports ol the cylinder, the cylinder' and cap member delinii'ig an open ended channel between tl'ien'i, a cover member tor one end of the channel .and connected to the cylinder and the cap mernlier, reepectivelyr` substantially dat slide Vvalvesy adapted lo the channel and comprising plates movable one on the other with each provided with a pair oit porti; cor reej'ionding to the ports ot the cylinder and the matching passages oi the cap. the ports of one Slide valve being ditlerently spaced from those ot the other and means tor reciprocating 'the plates one on the other Within the channel to open and close the inlet and exhaust ports in proper timed relation.

15. An explosion engine provided with a cylinder having adjacent inlet and exhaust ports, a detachable cap member4 for the ported portion of the cylinder and also provided With adjacent intake and exhaust passages matching the intake and exhaust ports of the cylinder, the cylinder and cap mem- 1'0 ber defining an open ended channel between them, a cover member for one end of the channel and connected to the cylinder and the cap member, respectively, slide valves adapted to the channel and comprising substantially flat plates movable one on the other with ports corresponding to the ports of the cylinder and the matching passages of the cap, and means for reciprocating the plates one on the other within the channel to open and close the inlet and exhaust ports in proper timed relation, thecylinder being provided with a water 4jacket having a Water channel between the ports, the cap member being provided with a water chamber surrounding the passages therethrough and the cover plate being provided with a water passage therethrough connecting the water jacket of the cylinder with the Water chamber of the cap member. p

16. An explosion eng'me having the end Wall of the explosion chamber provided with adjacent ports, a cap member for the yported end of the cylinder also provided with matching ports and defining a channel between the cap member and the ported end of the cylinder, said channel being open at both ends and both the cap member and cylinder being provided with water jackets,r a closure for one end of the channel pro!" 40 vided with a passage constituting a means of communication between the water jackets of the cylinder and the cap member, a casing forming a closure for the other end of the channel, substantially flat slide valves lodged in the channel and each provided with adjacent ports movable into matching relation with the ports of the other and with the ports of the cylinder and cap member, respectively, and actuating mechanism for the slide valves housed in the casing.

17. An explosion engine having adjacent ports in the end wall of the explosion chamber, a cap member provided with ports matching those of the cylinder and with intake and exhaust channels communicating with said ports, the ported end of the cyl- Ainder 'and the ported portion of the cap member defining an open ended channel and both the cylinder and cap member being '60V provided with water spaces, a closure for V'one end of the channel having a passage itherethrough constituting a means of cominunication Vbetween thewater spaces of the jacket andcap member, a casing covering the othenend ofthe channel, two flat slide valves movable one' on the other and housed v in the channel and each provided with ports movable into matching relation to the ports of the cylinder and cap member, respectively, the ports of one slide valve being diHerently spaced from those of the other, and actuating mechanism for the slide valves housed in the casing;

18. An explosion engine having adjacent ports in the end wall of the explosion chamber, a cap member provided with ports matching thosefof the cylinder and with intake and exhaust channels communicating with. said ports, the ported end of the cylind'er and the ported portion of the cap member defining an open ended channel and both the cylinder and cap member being provided with water spaces, a closure for one end of the channel having a passage v therethrough constituting a means of communication between'the water spaces of the jacket and cap member, a casing covering the other end of the channel, two flat slide valves movable one on the other and housed in the channel and each'provided with ports movable into matching relation to the ports of the cylinder and cap member, respectively, the ports of one slide valve being differently spaced from those of the other, and actuating mechanism forthe slide valves housed in the casing, the ports in the cylinder, cap and slide valves being elongated in a direction transverse to the direction of reciprocation of the slide valves and the actuating means being constructed to cause the reciprocation of the valves one on the other to open and close the inlet and exhaust ports in proper timed relation. i

19. An explosion engine of the four cycle vtype provided with associated flat slide valves having substantiallyfplane faces in contact and each traversed by a pair of adjacent ports, the engine being also provided with adjacent inlet and exhaust ports both on one side of the associated slide valves and having matching continuations of said ports on the other side of the associated slide valves, and means for reciprocating said slide valves in timed relation with respect to the cycles of operation of the engine.

20. In an internal combustion engine, the combination of a cylinder, 'avalve seat in the head of said cylinder, intake and exhaust ports in said head of saidcylinder, a lower sliding valve plate adapted to be moved across said valve seat, ports in said valve plate adapted to be brought into operative relation with said intake and exhaust ports, al second sliding valve plate superimposed upon said lower valve plate, ports in said second sliding'valve plate adapted to be brought into operative relation with said ports in said lower sliding valve plate, and

j with said intake and exhaust ports, and means whereby said sliding valve plates may be actuated in a manner whereby their movements are so timed that said intake and eX- haust ports are made alternately operative.

Q1. In an internal combustion engine, a cylinder, ports in said cylinder', a valve seat on the top of said Cylinder, a sliding valve plate adapted to be moved thereon, a casing superimposed about said valve plate, a means for actuating said sliding valve plate and a removable member opposite the free end of said valve plate, upon the removal of which member a deposit of carbon may be Withdrawn.

22. ln an internal combustion engine the combination of a cylinder, a sliding valve 15 means mounted on the top of said cylinder, means for' actuating said sliding valve means and an oil Container adapted to pro Vide a constant 'oil bath at the end of said valve plates.

In testimony, that I claim the foregoing as my own, I have hereto ailiXed my signature in the presence of two Witnesses.

ALEXANDER B. MOHLER.

Vitnesses C. H. MEY AFRAMONT, CLAUDE E. GUYANT. 

